O2Micro Receives Significant Power Management Unit Patent


SANTA CLARA, Calif. & GEORGE TOWN, Grand Cayman--(BUSINESS WIRE)--March 3, 2003-- O2Micro® International Limited (Nasdaq:OIIM - News), a leading supplier of innovative power management and security ICs to mobile computer and communications manufacturers, was granted 71 claims under United States patent number 6,507,173 for its single chip power management unit (PMU) apparatus and method.

Intended for Cellular Phones, PDA's, and other portable wireless-enabled appliances and adapters, this new PMU architecture achieves a high level of analog and digital integration. Integrated logic offloads much of the power management overhead from the system and assures power integrity under severe conditions.


"Combining multiple power supplies, protection circuitry, digital timing logic and more into a tiny, thermally efficient package, yields a near optimum solution," said Bruce Denning, O2Micro's Director of Engineering, Intelligent Battery business unit.


"We have started shipping PMU ICs for cell phone applications," said Sterling Du, Chairman and CEO of O2Micro, "and we will focus increasing efforts in the communications market as we move forward."


About O2Micro


Founded in April 1995, O2Micro designs, develops and markets innovative power management and security components for mobile communication, computer, information appliance, and LCD products. Products include AudioDJ®, SmartCardBus® for secure on line e-commerce, Intelligent Lighting and Battery Management IC's.


O2Micro International maintains an extensive portfolio of intellectual property with 1064 patent claims granted, and over 3600 more pending. The company maintains offices worldwide. Additional company and product information can be found on the company website at www.o2micro.com.


Statements made in this release that are not historical, including statements regarding O2Micro's or management's intentions, hopes, beliefs, expectations, representations, projections, plans or predictions of the future, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve risks and uncertainties that may cause actual results to differ materially from those set forth in these statements. Factors that could cause actual results to differ materially include risks and uncertainties such as reduced demand for products of electronic equipment manufacturers which include O2Micro's products due to adverse economic conditions in general or specifically affecting O2Micro's markets, technical difficulties and delays in the development process, and errors in the products. You are also referred to the documents filed by O2Micro with the SEC from time to time, including but not limited to the Form F-1 in connection with the company's initial public offering in August 2000, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements.





Grace Louh, 408/987-5920, Ext. 8051